*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Arial,sans-serif;
}

body{
    display:flex;
    background:#0f172a;
    color:white;
    min-height:100vh;
}

.sidebar{
    width:240px;
    background:#111827;
    padding:20px;
}

.sidebar h2{
    margin-bottom:25px;
}

.sidebar a{
    display:block;
    color:white;
    text-decoration:none;
    padding:12px;
    margin-bottom:8px;
    border-radius:8px;
}

.sidebar a:hover{
    background:#2563eb;
}

.main{
    flex:1;
}

.header{
    background:#1e293b;
    padding:20px;
    display:flex;
    justify-content:space-between;
    align-items:center;
}

.content{
    padding:25px;
}

.cards{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:20px;
}

.card{
    background:#1e293b;
    border-radius:12px;
    padding:20px;
}

.footer{
    background:#111827;
    text-align:center;
    padding:15px;
    margin-top:20px;
}